Malicious PDF — malware analysis report

Static analysis result for SHA-256 723317aa6ae34b04…

MALICIOUS

PDF

108.7 KB Created: 2021-03-25 10:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf0ec79c943ae043afab528272713788 SHA-1: 95c9fc4cc1d90e0d19457f864504aaaed42e1f99 SHA-256: 723317aa6ae34b043c750534ee73096228a2aa402b93683766236db5b1d1d880
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://jacksth.ru/wix?keyword=m%2526m+video+games+st+pete', and another suspicious link is 'http://wajoran.rf.gd/naxumexabokib.pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/wix?keyword=m%2526m+video+games+st+pete
    • http://dunizajo.66ghz.com/squatting_form_feet.pdf
    • https://cdn.sqhk.co/figegixo/kjdRjcr/seborowum.pdf
    • https://zitilegog.weebly.com/uploads/1/3/4/5/134501444/4a7449a87e17c.pdf
    • https://cdn.sqhk.co/kuxaroposa/aTgigOA/bubble_bobble_nes_secrets.pdf
    • https://xawaviwuxuj.weebly.com/uploads/1/3/4/2/134235980/jonanoju_tanawujezinir_dawixo_rekosedoveredon.pdf
    • https://pelozaxuji.weebly.com/uploads/1/3/2/6/132680784/sajivexenaleko.pdf
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/9266958.pdf
    • https://cdn.sqhk.co/kagitenoru/hi70oy3/solar.pdf
    • http://xisikanitalomu.iblogger.org/42245612641.pdf
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/pafutiti-wugas-xavobarugi-magigu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wajoran.rf.gd/naxumexabokib.pdf
    • https://uploads.strikinglycdn.com/files/aae27d29-87df-49d1-8209-8622fcd998e2/69450723995.pdf
    • https://07a970a6-a864-461d-ba0c-8deda34efc75.filesusr.com/ugd/b56c0d_1f0bfc1083794a6db8829acb0c80973a.pdf?index=true
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_9df2cad2f2804df084a78355989cff1b.pdf?index=true
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_8c312a5e000142ec9ea2f3a452778ed8.pdf?index=true
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_9bf0629b049c48f8ad82f79adbdffc73.pdf?index=true
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_eccbcaa6a3d64eff85c7e2ca103ae5cd.pdf?index=true
    • http://mibiravotawuga.epizy.com/philips_air_fryer_recipes_uk.pdf
    • https://uploads.strikinglycdn.com/files/11a8e9dd-7206-47df-9c47-1fa1f6118584/16462506295.pdf
    • http://dapolejalufimi.rf.gd/application_for_rent_california_association_of_realtors.pdf
    • https://s3.amazonaws.com/gonima/harry_potter_castle_location_in_scotland.pdf
    • https://s3.amazonaws.com/votuweroxigezog/89197655544.pdf
    • https://uploads.strikinglycdn.com/files/2be9914c-c1e1-4c30-b3a6-6247669ce7df/nixuzasilizaj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff52.bin
cb5ae3807e46cbecabb321a9fc29de52d79f0aae499522220716bfae76144afe
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 7688 bytes
font_01_sfnt_off00011327.bin
df5b803312c48d59b559c58557403d3f35eb1c4399c3b55d94ed0bbeb13f3094
pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 3488 bytes
font_02_sfnt_off00011e50.bin
303dcac89c17d00e936955988a223118c607d7679619d15860cdc2e7b41ec9aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E50 6228 bytes
font_03_sfnt_off00012d72.bin
da3441427d3e75bff49a51291186131708dca485fc2d1e7cdbc70da4c5455dde
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D72 1804 bytes
font_04_sfnt_off00013654.bin
76eeb662a8e06cefa626fa32fad6ffdf797f3fc19d52e5e53d1d1b7d20354559
pdf-font-stream PDF embedded font (sfnt) at offset 0x13654 17960 bytes
font_05_sfnt_off00016c39.bin
edc7d95f6004e1adfe2ec4e76db2c1cc39f738e678ab251eeea394bde81ac65f
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C39 17296 bytes
font_06_sfnt_off000185ea.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x185EA 4324 bytes
font_07_sfnt_off000193ad.bin
7d27f049ed16b743542f80cef2935f075349f690b7dd9161d3c43570bc88f734
pdf-font-stream PDF embedded font (sfnt) at offset 0x193AD 6184 bytes